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| Number | Title | Issue Date |
| 7372664 | Techniques to reduce adjacent track erasure including a write pole with a tip having faces at angles Techniques for reducing adjacent track erasure include: a bucking coil having a lower number of turns than the write coil for bucking out a portion of the field induced by the write coil; a hybrid solenoid coil that includes turns that are in a pancake arrangement a... | 05/13/2008 |
| 7365942 | Thin-film magnetic head A thin-film magnetic head for perpendicular magnetic recording comprises a coil, a main magnetic pole layer for performing perpendicular recording, a write shield layer and a write gap layer, wherein the main magnetic pole layer comprises a main pole film portion an... | 04/29/2008 |
| 7359147 | Single pole magnetic head having intermediate magnetic layer and tip magnetic layer A thin film magnetic head has a magnetic pole major layer terminated at a position receding from a medium-opposed surface. An intermediate magnetic layer extends forward toward the medium-opposed surface from the surface of the magnetic pole major layer. The interme... | 04/15/2008 |
| 7359148 | Thin film magnetic head including NiPRe alloy gap layer It is an object to provide a thin film magnetic head capable of improving characteristics and properties required of a gap layer by, in particular, appropriately controlling the compositional ratio of a NiPRe alloy used as the gap layer. A NiPRe alloy which has exce... | 04/15/2008 |
| 7349180 | Magnetic head assembly that has an air bearing surface First, second and third pole tip components of a write head are formed with the second pole tip located between the first and third components and a write gap layer located between the first and second pole tip components. The second pole tip is formed with a width ... | 03/25/2008 |
| 7347370 | Self-aligning magnetic read head incorporating lift-up detection Magnetic reading head assemblies are described that enable the alignment of a magnetic reading head to a track of magnetic information on a data card. In addition, embodiments of the present invention can enable the detection of misalignments in circumstances where ... | 03/25/2008 |
| 7339762 | Magnetic recording and reading device A magnetic recording and reading device includes a magnetic recording medium having a substrate and at least one magnetic recording layer formed above the substrate, a magnetic head enabling a data transfer rate of more than 50 MB/s and a recording density of more t... | 03/04/2008 |
| 7336441 | Yoke structure with a step A planar top yoke in a magnetic write head is disclosed. The top yoke includes a backside region and a second pole tip region that is thinner than the backside region and forms a step at the ABS. Alternatively, a front section of the backside region includes a step ... | 02/26/2008 |
| 7322095 | Process of manufacturing a four-sided shield structure for a perpendicular write head A process for reducing fringe field effects of a main write pole by shielding it on all four sides, with the regular return pole also serving as the leading edge shield, is described. The main pole may also be tapered and the leading edge and side shields may be mag... | 01/29/2008 |
| 7319572 | Thin film coil and method of forming the same, and thin film magnetic head and method of manufacturing the same Provided are a thin film coil formed at high densities, a method of forming a thin film coil, a thin film magnetic head which includes the thin film coil and thus enables ensuring stable recording characteristics while coping with a higher recording density, and a m... | 01/15/2008 |
| 7304822 | Magnetic head with multilayer film including metal magnetic films and non-magnetic films and magnetic recording/reproducing device In a magnetic head, a multilayer film is disposed, the multilayer film including metal magnetic films and non-magnetic films that are alternately laminated, and a boundary between the multilayer film and a magnetic oxide substrate or a non-magnetic substrate on whic... | 12/04/2007 |
| 7293344 | Process of making CD uniformity in high track density recording head A process for achieving tighter reader and writer track width control is disclosed. The write gap layer is used as the plating seed on which the upper pole is electro-formed. This allows the write gap layer to then be deposited through a precisely controllable proce... | 11/13/2007 |
| 7289295 | Return pole field reduction for perpendicular write head In a single vertical pole magnetic writer, flux passing through the return pole can sometimes be strong enough to erase previously recorded data. This problem has been overcome by the addition of a second return pole that is magnetically connected to the conventiona... | 10/30/2007 |
| 7265942 | Inductive magnetic head with non-magnetic seed layer gap structure and method for the fabrication thereof A magnetic head including first and a second magnetic poles with a write gap layer disposed therebetween. In a first embodiment the write gap layer includes a non-magnetic, non-conductive first sublayer which is preferably comprised of Ta or Ti which is deposited up... | 09/04/2007 |
| 7254884 | Method for fabricating a pole tip in a magnetic transducer using feed-forward and feedback Methods for fabricating pole piece tips for a magnetic transducer are disclosed. The ion-milling operations for trimming P2 and notching P1 are controlled using feed-forward and feedback. The preferred method of the invention includes steps for setting... | 08/14/2007 |
| 7248437 | Perpendicular magnetic recording head and method for manufacturing the same In a non-magnetic material layer, a concave portion is formed above a groove G. In addition, an auxiliary magnetic pole layer is formed having a convex portion which extends in the direction toward a main magnetic pole layer and which is placed in the concave portio... | 07/24/2007 |
| 7248435 | Thin-film magnetic head with gap and pole portion layers having cross sections of the same shapes and predetermined parameter ranges A bottom pole layer and a top pole layer respectively incorporate pole portion layers. Cross sections of the pole portion layers and a gap layer parallel to the top surface of a substrate are of the same shapes. The aggregate of the pole portion layers and the gap l... | 07/24/2007 |
| 7245454 | Magnetic head for vertical magnetic recording including main pole layer having varying width and thickness, head gimbal assembly, and hard disk drive A write head of a magnetic head for vertical magnetic recording comprises: a coil; a main pole layer that allows the magnetic flux corresponding to the magnetic field generated by the coil to pass therethrough and generates a write magnetic field; an auxiliary pole ... | 07/17/2007 |
| 7239482 | Thin-film magnetic head and nonmagnetic body filled concave portion formed on a pole layer and magnetic storage apparatus using the same A thin-film magnetic head is constituted by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element, a common pole layer, and a write gap layer in order on an insulating substrate, forming a first flattening layer, a coil pattern lay... | 07/03/2007 |
| 7230794 | Thin-film magnetic head with nonmagnetic body filled concave portion formed on a pole layer and magnetic storage apparatus using the same A thin-film magnetic head is constituted by forming a lower shielding layer, a read gap layer holding an MR magnetosensitive element, a common pole layer, and a write gap layer in order on an insulating substrate, forming a first flattening layer, a coil pattern lay... | 06/12/2007 |
| 7230793 | Magnetic recording head with anisotropic medium placed between poles A magnetic recording head includes a head body having an end divided into two parts, the two parts facing each other with a predetermined distance therebetween, first and second poles that are disposed on the two parts of the head body, respectively, to form a magne... | 06/12/2007 |
| 7227354 | Magnetic material amount detecting apparatus A magnetic material amount detecting apparatus includes primary winding and secondary winding which are wound on a core having a reading section to which a to-be-detected medium is set close. A current is supplied to the primary winding and an output signal from the... | 06/05/2007 |
| 7221539 | Stitched shielded pole structure for a perpendicular magnetic recording write head A PMR write head has a stitched shield formation which results in a strong perpendicular write field with sharp vertical gradients. The shape of the stitched shield is determined by two design parameters, d=½(WSWSLE−WMPTE), and TSWS | 05/22/2007 |
| 7215510 | Magnetic head and magnetic recording/reproducing apparatus for a video tape recorder, and a method of manufacturing the same A magnetic head comprises an MR element, and a substrate supporting the MR element from both sides at a center portion, and a magnetic tape is in contact and slide-contact with a slide-contact surface thereof. A curvature in a thickness direction of the slide-contac... | 05/08/2007 |
| 7215512 | Thin-film magnetic head, magnetic device including the same, and method for manufacturing the same A thin-film magnetic head includes a magnetic pole, a magnetic circuit unit separate from the magnetic pole, and a coil layer. The magnetic pole has a predetermined shape in which the width of the bottom surface of an upper magnetic pole layer is larger than the wid... | 05/08/2007 |
| 7215511 | Magnetic write head with gap termination less than half distance between pedestal and back gap A magnetic write head having a metal, non-magnetic write gap that extends only partially to the magnetic back gap, the remainder of the distance between the pole tip and the back gap being a magnetic material. The elimination of the seed layer reduces the amount of ... | 05/08/2007 |
| 7212379 | Perpendicular magnetic recording head with flare and taper configurations A magnetic write head for use in perpendicular magnetic data recording. The write head includes a write pole and a trailing shield having a tapered surface. A return pole stitched to the trailing shield is magnetically connected with the write pole at a location awa... | 05/01/2007 |
| 7207098 | Hard mask method of forming a reader of a magnetic head A method of forming a reader of a magnetic head includes multiple processing steps. First, a sensor is formed having an air bearing surface. Next, a hard mask is formed on the sensor extending a distance from the air bearing surface substantially equal to the desire... | 04/24/2007 |
| 7206167 | Servo write method for magnetic tape A batch fabrication technique is described that increases the manufacturing efficiency of servo write heads and also improves servo pattern definition for fine features, while reducing tape and head wear. Multiple heads are fabricated as a batch from one or more fer... | 04/17/2007 |
| 7199973 | Perpendicular magnetic recording head with trailing shield throat height less than shaping layer distance from ABS A head structure having a write head portion for writing data to magnetic media. The write head portion includes a first pole piece with a first pole tip, a probe pole piece having a probe pole tip for emitting magnetic flux from an ABS end thereof, an insulation st... | 04/03/2007 |
| 7199972 | Narrow write head pole tip fabricated by sidewall processing The magnetic head includes a P2 pole tip in which the P2 pole tip material is electroplated upon a sidewall of the P2 pole tip photolithographic trench. To accomplish this, a block of material is deposited upon a write gap layer, such that a generally straight, vert... | 04/03/2007 |
| 7196870 | Patterned magnetic recording head with termination pattern having a curved portion A thin-film magnetic recording head utilizing a timing based servo pattern is fabricated by sputtering a magnetically permeable thin film onto a substrate. A gap pattern, preferably a timing based pattern, is defined by the thin film. The gap pattern includes termin... | 03/27/2007 |
| 7181829 | Method of manufacturing a perpendicular magnetic recording head A main magnetic pole layer is formed on an insulating layer flattened into a high-flatness surface, and a yoke layer having a large film thickness is formed under the main magnetic pole layer independently of the main magnetic pole. The main magnetic pole layer has ... | 02/27/2007 |
| 7180705 | Thin film magnetic head capable of reducing expansion and bending of a recording pattern, method of manufacturing the same and magnetic recording apparatus Provided is a thin film magnetic head capable of reducing expansion and bending of a recording pattern resulting from a skew so as to improve recording performance. A main pole layer comprises a laminate including a bottom main pole layer being disposed on a medium-... | 02/20/2007 |
| 7180704 | Magnetic head for perpendicular recording and magnetic disk storage apparatus mounting the head A magnetic head is composed to diminish disordered writing bits of a recording layer or reading noise caused by a magnetic field generated from an under layer without decreasing a writing magnetic field strength of the magnetic head. The magnetic head includes a wri... | 02/20/2007 |
| 7152305 | Method for fabricating a magnetoresistive (MR) read head A magnetoresistive (MR) read head is disclosed including a shield layer with a recessed portion and a protruding portion defined by the recessed portion. Also included is an MR sensor located in vertical alignment with the protruding portion of the shield layer. Fur... | 12/26/2006 |
| 7154705 | Magnetic head for rotary head drum A magnetic head for a rotary head drum is disclosed which can suppress abrasion thereof while a sufficient contact thereof with a magnetic tape is secured. An upper side tape sliding surface and a lower side tape sliding surface are formed on a tape sliding surface ... | 12/26/2006 |
| 7151647 | Thin film magnetic head and manufacturing method for creating high surface recording density and including a second yoke portion having two layers of which one is etched to form a narrow portion and a sloped flare portion The invention is directed to improvement of a write element of a thin film magnetic head. In the write element, a first coil and a second coil are provided on a first insulating film formed on one surface of a first magnetic film and surround in a spiral form a back... | 12/19/2006 |
| 7149045 | Longitudinal media with soft underlayer and perpendicular write head A magnetic recording device including a longitudinal magnetic recording medium. The longitudinal magnetic recording medium includes a magnetically soft underlayer disposed under a longitudinal recording layer. A perpendicular write head is utilized to write data to ... | 12/12/2006 |
| 7126795 | Magnetic recording head, a magnetic reproducing head, a magnetic recording apparatus, and a magnetic reproducing apparatus A magnetic recording head, a magnetic reproducing head, a magnetic recording apparatus comprising the magnetic recording head, and a magnetic reproducing apparatus comprising the magnetic reproducing head are described. The magnetic reproducing head having a magneti... | 10/24/2006 |
